The floating tube uses an adapter that takes the place of the original barrel nut assembly Then theres a lock nut that scews over it and the tube scres onto the adapter and gets clocked in place with the lock nut. Pretty solid really.

The silencer is an SWR trident and they are probably the best all around 9mm silencer. I have adapters for pistol use and AR and I have an AK 14x1mm LH adapter on order from TROS on order to use with subsonic 7.62's . There is not much point to shoot without subsonics and 147 grains are common at sporting goods stores and are subsonic out of the AR-15 barrel. Having said all that 9mm's are not dead quiet even out of the best silencer. Sounds about like a roofing nail gun. Produces a noticeable echo. Doesnt sound like a gun but it definitely makes a 5 lb phone book dropping onto concrete sound. I always laugh when I hear guys saying how their silenced 9mm only makes the noise of the action cycling. Its not like that.